Processor, Heatsink, And Socket Components - HPE ProLiant DL180 Gen10 User Manual

The arrow points to the front of the server.

Processor, heatsink, and socket components

Item Description
1 Heatsink nuts
2 Processor carrier
3 Pin 1 indicator
4 Heatsink guide/keying feature
5 Alignment post
6 Heatsink keying frame
1
Symbol also on the processor and frame.
1
22
Component identification